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February 1, 2025

Grey Iron in ISO 185

Introduction of Grey Iron in ISO 185

Grey Cast Iron is also known as flake graphite cast iron, and less commonly as lamellar graphite cast iron. castings in ISO 185 are popular gray iron material.

Manufacture Process for Grey Iron in ISO 185

  • Sand Casting
  • Shell Casting
  • Lost Foam Casting

Our Services

  1. Sand Casting

    Casting Quality focus on Metal Parts industry, we provide professional service in Metal Casting field.

    Sand Casting is a popular metal form method, are suitable for all materiel, such as grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum and bronze.

  2. Investment Casting

    Also named as precision lost wax casting, mainly suitalbe for carbon steel and stainless steel parts. We also provide grey iron and ductile iron and aluminum and bronze parts by investment casting. It can achieve the best appearance with good tolerance

  3. Shell Casting

    Shell casting method is a good option to replace investment casting and sand casting. the quality is better than sand casting parts, suitable for bulk production.

  4. Permanent Mold Casting

    For aluminum parts and Brozne parts

  5. CNC Machining

    CNC Milling, CNC turning with 5 xix CNC center, we provide precision machining for all castings based on customers design drawings.

  6. CAD Design

    Mechanical Design service based on customers requirement, our software is Solidworks and AutoCAD.

  7. Tools/Mold Design

    Mould design and production will be served for metal casting ad plastic injection industry. Based on our more than 10 years experience, we supply professional molds for our customers in Europe and North American.

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Content for ISO 185 Grey Iron

Standard of Grey Iron

ISO 185: 2005 Grey Cast Irons – Classification (grey cast iron)

Grey Iron in ISO 185 Equivalent Material Grades

 

ISO 185:2004 ISO 185:1988 EN 1561 ASTM A48 JIS G5501 SAE J431 GB/T 9439:2010
ISO 185/JL/150 150 EN-GJL-150 150 FC150 G9H12 HT150
ISO 185/JL/200 200 EN-GJL-200 200 FC200 G10H18 HT200
ISO 185/JL/225 – – 225 – G10/21/G11H18 HT225
ISO 185/JL/250 250 EN-GJL-250 250 FC250 G11H20 HT250
ISO 185/JL/275 – – 275 – G12H21/G13H19 HT275
ISO 185/JL/300 300 EN-GJL-300 300 FC300 G13H22 HT300
ISO 185/JL/350 350 EN-GJL-350 350 FC350 G13H24 HT350
ISO 185/JL/HBW155 H145 EN-GJL-HB155 – – H10 H155
ISO 185/JL/HBW175 H175 EN-GJL-HB175 – – H11 H175
ISO 185/JL/HBW195 H175/H195 EN-GJL-HB195 – – H13/H14 H195
ISO 185/JL/HBW215 H175/195/215 EN-GJL-HB215 – – H15 H215
ISO 185/JL/HBW235 H195/215/235 EN-GJL-HB235 – – H18 H235
ISO 185/JL/HBW255 H215/235/255 EN-GJL-HB255 – – H20 H255

Grey Iron in ISO 185 Material Property

Density:

  • ISO 185/JL/150 – 7.1kgs/dm3;
  • ISO 185/JL/200 and ISO 185/JL/225 – 7.15kgs/dm3;
  • ISO 185/JL/250 and ISO 185/JL/275 – 7.2kgs/dm3;
  • ISO 185/JL/300 and ISO 185/JL/350 – 7.25kgs/dm3;

Grey Iron in ISO 185 Chemical Composition Requirements

The chemical composition shall be left to the discretion of the manufacture , shall ensure that the requirements of ISO 185 standard are met for the material grade . No any standard mentioned the chemistry composition, so we only suggest the following chemistry based on our experience.

Grade Wall Thickness
(mm)		 C Si Mn P
≤		 S
≤
ISO 185/JL/100 – 3.4~3.9 2.1~2.6 0.5~0.8 0.3 0.15
ISO 185/JL/200 <30
30~50
>50		 3.3~3.5
3.2~3.5
3.2~3.5		 2.0~2.4
1.9~2.3
1.8~2.2		 0.5~0.8
0.5~0.8
0.6~0.9		 0.2
0.2
0.2		 0.12
0.12
0.12
ISO 185/JL/250 <30
30~50
>50		 3.2~3.5
3.1~3.4
3.0~3.3		 1.6~2.0
1.5~1.8
1.4~1.6		 1.7~0.9
0.8~1.0
0.8~1.0		 0.15
0.15
0.15		 0.12
0.12
0.12
ISO 185/JL/300 <30
30~50
>50		 3.0~3.3
2.9~3.2
2.8~3.1		 1.4~1.7
1.3~1.6
1.2~1.5		 0.8~1.0
0.9~1.1
1.0~1.2		 0.15
0.15
0.15		 0.12
0.12
0.12
ISO 185/JL/350 <30
30~50
>50		 2.9~3.2
2.9~3.2
2.8~3.1		 1.4~1.7
1.2~1.5
1.1~1.4		 0.8~1.0
0.9~1.1
1.0~1.2		 0.15
0.15
0.15		 0.10
0.10
0.10

Grey Iron in ISO 185 Mechanical Property

The material can be designated as two methods: a) the tensile strength in separately casting; b) the hardness of material.

Grade Wall thickness mm Mechanical Requirements
Tensile strength mandatory Value Tensile Strength anticipated value in castings
Symbol Over Up to In separately casting sample (N/mm2) ,min In cast-on samples (N/mm2) min Tensile Strength, Rm min, (MPa)
ISO 185/JL/100 5 40 100 – –
ISO 185/JL/200 2.5 5 150 – 180
5 10 – 155
10 20 – 130
20 40 120 110
40 80 110 95
80 150 100 80
150 300 90 –
ISO 185/JL/200 2.5 5 200 – 230
5 10 – 205
10 20 – 180
20 40 170 155
40 80 150 130
80 150 140 115
150 300 130 –
ISO 185/JL/225 5 10 225 – 230
10 20 – 205
20 40 190 170
40 80 170 150
80 150 155 135
150 300 145 –
ISO 185/JL/250 5 10 250 – 250
10 20 – 225
20 40 210 195
40 80 190 170
80 150 170 155
150 300 160 –
ISO 185/JL/275 10 20 275 – 250
20 40 230 220
40 80 205 190
80 150 190 175
150 300 175 –
ISO 185/JL/300 10 20 300 – 270
20 40 250 240
40 80 220 210
80 150 210 195
150 300 190 –
ISO 185/JL/350 10 20 350 – 315
20 40 290 280
40 80 260 250
80 150 230 225
150 300 210 –

Brinell hardness of castings of grey cast iron:

Grade material Relevant Wall thickness (mm) Brinell hardness (HBW)
Symbol Over Up to Min Max
ISO 185/JL/HBW155 2.5 5 – 210
5 10 185
10 20 170
20 40 160
40 80 150
ISO 185/JL/HBW175 2.5 5 170 260
5 10 140 225
10 20 125 205
20 40 110 185
40 80 100 175
ISO 185/JL/HBW195 4 5 190 275
5 10 170 260
10 20 150 230
20 40 135 210
40 80 120 195
ISO 185/JL/HBW215 5 10 200 275
10 20 180 255
20 40 160 235
40 80 145 215
ISO 185/JL/HBW235 10 20 200 275
20 40 180 255
40 80 165 235
ISO 185/JL/HBW255 20 40 200 275
40 80 185 255

Grey Iron in ISO 185 Heat Treatment Requirement

Generally, the castings are supplied without heat treatment.

Grey Iron in ISO 185 Application

  • Pump and valve
  • Machinery bed.
  • Machinery parts.

Grey Iron Machinability:

Very good, easy for machining such as milling, turning or drilling.

Grey Iron Weldability:

Very bad. Generally, castings welding require the purchaser’s approval. The welding process and the filler metals should be appropriated to the use of the casting in manner intended.

Flanged Track Wheels Roller, Sand casting with CNC machining

Flanged Track Wheels

Cast Iron Wheels was made by sand casting process, it’s also named as guide rollers or Track casters for railway, Flanged Track Wheels, Flange Track Roller,Industrial Track wheels,Steel Rail Wheels.

Ductile Iron Spindle Housing Casting

Ductile Iron Spindle Housing

Spindle Housing for Shaft or Stem or bearing by Sand Casting. the Material can be: Ductile Iron Casting GGG40, GGG50,GGG60,GGG70, GGG80

Cast Iron Cylinder

Cast Iron Cylinder Liner Sleeves

Casting Method: Sand Casting or Centrifugal Casting Precision Machining: Lathe turning and grinding. Material: Grey Iron HT250; GG20; FC25 Cylinder liner is a central working part

Pump Spare Parts- Guiding Device

Guiding Device-Pump Spare Parts

Sand Casting process with CNC machining; Cast grey iron ( gray iron)  HT200/GG20/GG25  material; Pump Guiding Device Fittings with static balance, Paint protected

Cast Iron Pump Impeller with Machining

Pump Impeller

Cast Iron Impeller castings for water pumps. The mainly material is cast gray iron GG20/HT200/HT300. Sand casting method with CNC machining and static balance.

Malleable Iron Nipple

Malleable iron fittings, nipple， mateiral is malleable iron 300-6. Black surface or hot dipped surface(white). Sand Casting , hot dipped with thread Machining. Standard: EN 10242, DIN 2950

As a professional manufacturer in China, We Casting Quality focus on Metal Parts OEM industry, and provide solutions and services in Metal Casting field as following:

  1. Sand Casting
  2. Investment Casting, Lost Wax process
  3. Shell Casting
  4. Lost Form Casting
  5. CNC Machining
  6. CAD Design
  7. Tools/Mold Design

Material Supplied

  • Cast Iron Castings (Grey Iron, Malleable Iron, Ductile Iron)
  • Carbon Steel and Alloy Steel Castings
  • Stainless Steel and Duplex Stainless Steel Castings
  • Aluminum Castings
  • Bronze and Brass Castings
  • Titanium and Cobalt Alloy Castings

What We Can Do

  • Design Ability

Our engineers will help you to improve the designs based on casting technology, then The simulation software will be processed to verify the casting pouring system. Pro/E, Solidworks, AutoCAD and ProCast are available in Casting Quality Industrial.

  • Saving Cost

Some manufacture processes may lead high cost. We will analyse the designs and advise the suitable methods to our customers. The best solution will be adopted.

  • Quality Control

From the raw material selecting to bulk production processing, all procedures will follow PPAP program if necessary. The certificates will be provided including chemistry, hardness, mechanical property or NDT testing.

  • Production Capacity

The max iron/steel castings can reach 30tons in weight, meanwhile the minus casting is around 1gram only.

We also have prototyping and 3D scanning ability for sample plan.

  • Logistic Service

The products will be delivered directly to customer’s workshop, which will save plenty of work for clients.

Grey Cast Iron

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